Globe or other valve.



rrnn drains nrnr rricn.

NA'IIIANIEL O. LOCKE, OF SALEM, MASSACHUSETTS.

GLUBE UR OTHER VALVE.

SPEGIFICATTUM formingpart of Letters Patent No. 668,012, dated February12, 1901.

Application filed May 22, 1900. S rial No. 17,564. (No model.)

(10 all, whom, (It may concern.-

Be it known that I, NATHANIEL CHASE LOCKE, a citizen of the UnitedStates, and a resident of the city of Salem, county of Essex, and Stateof Idassachusetts, have invented new and useful Improvements in Globe orother Valves, of which the following is a specification.

My invention relates to that class of valves in which one of the seatsis composed of a material softer and more yielding than that of whichthe opposite seat is composed.

The objects of my invention are, first, to provide a perfectly-tightvalve when closed, and, second, to prevent the soft packing composin oneof its seats from wasting away with constant use. I attain these objectsby the mechanism illustrated in the accompanying drawings, whichrepresent a valve embodying my improvements.

l-iy reference to my patent numbered 256,102), dated April 4:, 1882, itwill be observed that the valvedisk contains a softmetal filling, whichwhen the valve is closed comes in contact with the raised seat in thebody of the valve having a rounded upper surface made in the form of ahead. This form of valveseat was found objectionable, as it rapidly woreits way into the soft metal, forcing it away upon either side. Thisdefeet is remedied in the form of valve herein shown and described.

In the accompanying drawings, Figure 1 is a vertical section of thevalve. Fig. 2 is a section of the val i e-disk, showing the changedcondition of the SOfl'rlllBlitl seat.

In Fig. 1, A is the valve-casing.

B is the inlet, and C the outlet.

to is the valve-opening through partition E E, which divides the cavityof casing A into two chambers.

12 is the raised portion around opening a, forming the valve-seat, whichhas the circular groove or depression a, and thereby dividing thesurface of the valve-seat into two parts and a D is the valve-disk,containing the soft packing, which may he of a soft metallic alloy orany other suitable substance.

d is the spindle of the valve, to which disk D is attached in the usualmanner, so that it may adjust itself to the valve-seat in closing.Extending from the valve-disk the central portion g is made to operateas a guide to the valve in closing and to protect the seats of the valvefrom the cutting action of the fluid when passing through the valve.

The operation is as follows: The valve is placed in a line of pipethrough which fluid is passing and closed to its seat by use of wheel W.The soft packing is thus brought into contact with the valveseat. Theraised portions (1. and a will come intocontact with the packing nearthe outer and inner walls 0 and 0 respectively.

It will be seen that this is a double-seated valve, in which the fluidmust pass both points of contact before it can escape through the valve.

Constantly closing this valve has a tendency to make an impression intothe soft metal, throwing the displaced metal toward the center, where itis caught and held by the circular groove between the valve'seats untilthis is entirely filled, which forms a continuous point of contact fromone seat to the other; but as the metal can no longer be displaced itremains in this condition indefinitely.

WVhat I claim, and desire to secure by Letters Patent, is-

A valve of the kind described, comprising a casing having a partitionwithin it with a valve-opening through the partition, a raised portionaround the valve-opening, said raised portion having in its face agroove which divides the said raised part into two seats, and avalve-disk to fit the seat and close the valveopening, said disk havinga central guide, an annularly-recesscd seating portion, the outer andinner walls of which seating portion fit over the valve-seat, and a softmetal in said recessed portion, this metal being adapted to fit upon thevalve-seat and fill the groove thereof.

In testimony whereof I affix my signature in presence of two witnesses.

NATHANIEL C. LOOKE.

/Vitnesses:

FRANK E. LooKE, LILLIE V. HARDING.

